Return the outline property values of a <div> element:
alert(document.getElementById("myDiv").style.outline);
<!DOCTYPE html> <html> <body> <div id="myDiv" style="border:3px solid red;outline:3px dotted green">This is a div element.</div> <br> <button type="button" onclick="myFunction()">Return outline</button> <p id="demo"></p> <script> function myFunction() {//from w w w .jav a 2 s .c o m document.getElementById("demo").innerHTML = document.getElementById("myDiv").style.outline; } </script> </body> </html>